黑河地区8种乔木含水率季节变化及影响因素分析
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摘要
通过对黑河地区落叶松、红松等8种乔木含水率的测定,描述了该8种乔木含水率季节变化,分析含水率与影响因子间的关系。结果表明:(1)活可燃物含水率主要受自身生理机制影响,植物种之间含水率差异较大。水冬瓜、黑桦含水率持续高于250%,属于难燃树种;落叶松、红松含水率持续高于200%,并且最低含水率高于130%,属于不易燃树种;偃松、樟子松、油松和蒙古栎含水率平均值低于200%,属于易燃树种。(2)可燃物含水率与日最高气温、土壤含水率、5天前累加降雨量和日照时数四个因子关系显著。
Through the determination of the moisture content of 8 kinds of trees in Heihe area,the seasonal changes of moisture content were described and the relationship between moisture content and impact factors was analyzed.Result shows that:1)The moisture content of the living combustible is mainly affected by its own physiological mechanism,and the moisture content of the plant species varied greatly.The moisture content of the four species(Larix gmelinii,Fraxinus mandschurica,Juglans mandshurica,and(Padus racemosa)is consistently higher than200%,and the lowest moisture content is higher than 130%,belonging to the hard-to-burn species;moisture content of Larix gmelinii &Pinus koraiensis is continuously higher than 200%,the average value of the water content of Pinus pumila,Pinus sylvestris var.mongolica,Pinus tabulaeformis & Quercus mongolicais less than 200%,belonging to the easy-to-burn species;the moisture content of larch and Pinus tabulaeformis is less than 130%in the leaf stage,which is flammable;2)The moisture content of combustibles has a significant relationship with the highest daily temperature,meteorological drought index,40 cm shallow ground temperature and sunshine hours.
Through the determination of the moisture content of 8 kinds of trees in Heihe area,the seasonal changes of moisture content were described and the relationship between moisture content and impact factors was analyzed.Result shows that:1)The moisture content of the living combustible is mainly affected by its own physiological mechanism,and the moisture content of the plant species varied greatly.The moisture content of the four species(Larix gmelinii,Fraxinus mandschurica,Juglans mandshurica,and(Padus racemosa)is consistently higher than200%,and the lowest moisture content is higher than 130%,belonging to the hard-to-burn species;moisture content of Larix gmelinii &Pinus koraiensis is continuously higher than 200%,the average value of the water content of Pinus pumila,Pinus sylvestris var.mongolica,Pinus tabulaeformis & Quercus mongolicais less than 200%,belonging to the easy-to-burn species;the moisture content of larch and Pinus tabulaeformis is less than 130%in the leaf stage,which is flammable;2)The moisture content of combustibles has a significant relationship with the highest daily temperature,meteorological drought index,40 cm shallow ground temperature and sunshine hours.
引文
[1]Pyne SJ,Andrews PL,Laven RD.Introduction to Wildland Fire[J].Introdunction to wildland Fire,1996
[2]Pellizzaro G,Cesaraccio C,Duce P,et al.Relationships between seasonal patterns of live fuel moisture and meteorological drought indices for Mediterranean shrubland species[J].International Journal of Wildland Fire,2007,16:232–241
[3]Castro FX,Tudela A,Serra I.,et al.Patterns of variation of Rosmarinus officinalis live fine fuel moisture[J].Forest Fire Research and Wildland Fire Safety,2002,72:1-9
[4]Chuvieco E,Aguado I,Dimitrakopoulos AP.Conversion of fuel moisture content values to ignition potential for integrated fire danger assessment[J].Canadian Journal of Forest Research,2004,34(11):2284–2293
[5]Andrews P.BEHAVE:Fire behavior prediction and fuel modeling system–burn subsystem,part1.USDA Forest Service,Intermountain Forest and Range Experiment Station[C].General Technical Report INT-194,1986
[6]王瑞君,于建军,郑春艳.森林可燃物含水率预测及燃烧性等级划分[J].森林防火,1997(2):16-17
[2]Pellizzaro G,Cesaraccio C,Duce P,et al.Relationships between seasonal patterns of live fuel moisture and meteorological drought indices for Mediterranean shrubland species[J].International Journal of Wildland Fire,2007,16:232–241
[3]Castro FX,Tudela A,Serra I.,et al.Patterns of variation of Rosmarinus officinalis live fine fuel moisture[J].Forest Fire Research and Wildland Fire Safety,2002,72:1-9
[4]Chuvieco E,Aguado I,Dimitrakopoulos AP.Conversion of fuel moisture content values to ignition potential for integrated fire danger assessment[J].Canadian Journal of Forest Research,2004,34(11):2284–2293
[5]Andrews P.BEHAVE:Fire behavior prediction and fuel modeling system–burn subsystem,part1.USDA Forest Service,Intermountain Forest and Range Experiment Station[C].General Technical Report INT-194,1986
[6]王瑞君,于建军,郑春艳.森林可燃物含水率预测及燃烧性等级划分[J].森林防火,1997(2):16-17